International Journal of Naval Architecture and Ocean Engineering

The Society of Naval Architects of Korea (대한조선학회)
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Experimental study on multi-level overtopping wave energy convertor under regular wave conditions

  • Liu, Zhen (Shandong Provincial Key Laboratory of Ocean Engineering, Ocean University of China) ;
  • Han, Zhi (Department of Ocean Engineering, College of Engineering, Ocean University of China) ;
  • Shi, Hongda (Shandong Provincial Key Laboratory of Ocean Engineering, Ocean University of China) ;
  • Yang, Wanchang (Cangzhou Port Group)
  • Received : 2017.03.09
  • Accepted : 2017.10.15
  • Published : 2018.09.30
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Abstract

A multi-level overtopping wave energy converter was designed according to the large tidal range and small wave heights in China. It consists of two reservoirs with sloping walls at different levels. The reservoirs share a common outflow duct and a low-head axial turbine. The experimental study was carried out in a laboratory wave-flume to investigate the overtopping performance of the device. The depth-gauges were used to measure the variation of the water level in the reservoirs. The data was processed to derive the time-averaged overtopping discharges. It was found that the lower reservoir can store wave waters at the low water level and break the waves which try to climb up to the upper reservoir. The upper sloping angle and the opening width of the lower reservoir both have significant effects on the overtopping discharges, which can provide more information to the design and optimization of this type of device.

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References

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